 Spencer TracyGeorge Heisler | George Heisler |
 Signe HassoToni | Toni |
 Hume CronynPaul Roeder | Paul Roeder |
 Jessica TandyLiesel Roeder | Liesel Roeder |
 Agnes MooreheadMadame Marelli | Madame Marelli |
 Herbert RudleyFranz Marnet | Franz Marnet |
 Felix BressartPoldi Schlamm | Poldi Schlamm |
 Ray CollinsWallau | Wallau |
 Alexander GranachZillich | Zillich |
 Katherine LockeFrau Hedy Sauer | Frau Hedy Sauer |
 George MacreadyBruno Sauer | Bruno Sauer |
 Paul GuilfoyleFiedler | Fiedler |
 Steven GerayDr. Loewenstein | Dr. Loewenstein |
 Kurt KatchLeo Hermann | Leo Hermann |
 Kaaren VerneLeni (as Karen Verne) | Leni (as Karen Verne) |
 Konstantin ShayneFuellgrabe | Fuellgrabe |
| GGeorge SuzanneBellani | Bellani |
 John WengrafOverkamp | Overkamp |
 George ZuccoFahrenburg | Fahrenburg |
| SSteven MullerHellwig | Hellwig |
 Eily MalyonFraulein Bachmann | Fraulein Bachmann |
 Hugh BeaumontTruck Driver (uncredited) | Truck Driver (uncredited) |
 Charles ArntHerr Binder (uncredited) | Herr Binder (uncredited) |
 Robert BlakeSmall Boy (uncredited) | Small Boy (uncredited) |
 Paul E. BurnsPelzer (uncredited) | Pelzer (uncredited) |
 William ChalleeFischer (uncredited) | Fischer (uncredited) |
| RRussell CusterPrisoner at Concentration Camp (uncredited) | Prisoner at Concentration Camp (uncredited) |
 William EdmundsAldinger (uncredited) | Aldinger (uncredited) |
 Frank HagneyMan on Street (uncredited) | Man on Street (uncredited) |
| JJimmy HawkinsPaul and Liesel Roeder's Son (uncredited) | Paul and Liesel Roeder's Son (uncredited) |
